(19)

(11)

EP 2 531 404 A2

(12)

(88) Date of publication A3: 28.06.2012 (43) Date of publication: 12.12.2012 Bulletin 2012/50 (21) Application number: 11713901.4 (22) Date of filing: 31.01.2011

(51) International Patent Classification (IPC):  B64F 1/36(2006.01) B64D 41/00(2006.01) B64F 5/00(2006.01) (86) International application number: PCT/US2011/023131 (87) International publication number: WO 2011/097156 (11.08.2011 Gazette 2011/32)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 02.02.2010 US 698561 (60) Divisional application: 12185258.6 (71) Applicant: Pratt&Whitney Line Maintenance Services Inc. East Hartford, Connecticut 06118 (US)	(72) Inventors: NORDLUND, Sebastian S-16938 Solan (SE) AMCOFF, Henrik S-13143 Nacka (SE) NYBERG, Helena S-11224 Stockholm (SE) (74) Representative: Tomlinson, Kerry John  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)